.box {
    width: 350px;
    margin: 200px auto;
    /* text-align: center; */
    /*background: #ffa181;*/
    /*border: 1px solid black;*/
}
tr{
    height: 40px;
}
td {
    width: 250px;
}
body{
    background-image: url('../img/bg2.png') no-repeat center fixed;
    background-size: cover;
}
img {
  height: auto;
  width: 294px;
  
}
h1 {
  text-align: center;
  font-weight: 500;
  font-size: 28px;
}
.layui-col-md3 {
  margin: 200px auto;
  text-align: center;
}